1012022102221 has 4 divisors (see below), whose sum is σ = 1089869956252. Its totient is φ = 934174248192.

The previous prime is 1012022102213. The next prime is 1012022102239. The reversal of 1012022102221 is 1222012202101.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 328111296100 + 683910806121 = 572810^2 + 826989^2 .

It is a cyclic number.

It is not a de Polignac number, because 1012022102221 - 2³ = 1012022102213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1012022102195 and 1012022102204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1012022102251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38923926996 + ... + 38923927021.

It is an arithmetic number, because the mean of its divisors is an integer number (272467489063).

Almost surely, 2^{1012022102221} is an apocalyptic number.

It is an amenable number.

1012022102221 is a deficient number, since it is larger than the sum of its proper divisors (77847854031).

1012022102221 is an equidigital number, since it uses as much as digits as its factorization.

1012022102221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77847854030.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 1012022102221 its reverse (1222012202101), we get a palindrome (2234034304322).

The spelling of 1012022102221 in words is "one trillion, twelve billion, twenty-two million, one hundred two thousand, two hundred twenty-one".